CN1586067A - Hand-operated device - Google Patents

Abstract

The invention is based on a handheld device, in particular a locating device, having a housing (10), which is movable with a handle unit (12) over a surface of an item being examined and which has a sensor unit (16) for picking up a first motion parameter. It is proposed that at least one second motion parameter can be detected with the sensor unit (16).

Description

Handheld Appliances

current technology

The invention relates to a hand-held appliance according to the preamble of claim 1 .

A hand-held locator is known which has a carriage with 4 wheels, wherein each two wheels are mounted on a longitudinal side of the locator. The wheels facing each other are respectively connected by a shaft extending perpendicular to the longitudinal extension direction of the locator. On the upper side of its housing, the locator has a holding unit extending on the longitudinal extension, by means of which the locator can be moved along its longitudinal extension on the surface of an object to be inspected with the rolling surface of the wheels drive.

In order to receive a movement variable by means of a sensor unit, the two rigid shafts and the sensor unit are mechanically coupled via a toothed belt.

Advantages of the invention

The invention relates to a hand-held device, in particular a locator, which has a housing which can be moved on the surface of an object to be inspected by means of a gripping unit, and which has a sensor unit, Used to receive a first motion parameter.

The invention proposes that at least one second motion variable can be measured with the sensor unit. Advantageously, additional information can be sensed, for example information about the distance of the housing from the surface of the object to be inspected and/or the movement of the housing on a curved trajectory, etc. This additional information can be used to correct the measurement results and advantageously at least reduce measurement errors, in particular by comparing the movement variables with one another. Furthermore, measurement errors, in particular errors due to unexpected changes in the direction of movement, can be displayed via a display and corrected manually and/or automatically via the actuator. Furthermore, in the event of a failure of the sensor unit for detecting the first movement variable, an at least partially usable measurement result can be obtained by means of the second movement variable, in particular if the second movement variable is of the same type as the first movement variable quite time.

Undesired motions of the housing can be easily inferred if characteristic parameters regarding the rotation of the housing around at least one axis can be determined from the measured motion variables, especially if the axis extends in the normal direction of the surface of the object under inspection. When the line direction is up.

In a further embodiment of the invention it is provided that the sensor unit has at least two sensors. It is thus advantageously possible to use standard parts to realize a structurally simple and cost-effective device with which two movement variables can be measured simultaneously.

Advantageously, the sensor is formed at least partially from electronic components. Space-saving, cost-effective and precise sensors can also be used, the signals of which can be emitted in electrical form and can be easily reprocessed electronically. Motion parameters can be measured by contact or non-contact methods. Friction between corresponding components can advantageously be avoided and operator comfort can be increased if the movement variable is measured in a contactless manner. Sensors for contactless detection can be designed as a function of various input parameters that are considered meaningful by a person skilled in the art, for example as a function of magnetic, electrical, optical and/or thermal input parameters.

In a further embodiment of the invention it is provided that the sensor unit has at least one photoelectric sensor, by means of which at least one of the two motion variables can be measured without contact with the surface of the object to be examined. Advantageously, this enables a particularly comfortable measuring process in which the housing is moved contactlessly over different trajectories of motion over the surface of the object to be examined, for example on a straight line, with a scraping movement on a curved path or on a A circular trajectory on the other.

Furthermore, it is proposed that a chassis with at least one first rolling body is mounted on the housing, by means of which at least a first movement variable can be measured. Advantageously, the first motion variable can be detected in a structurally simple and cost-effective manner by rolling the rolling body on the surface of the object to be examined.

If the running gear has at least one second rolling body, by means of which at least a second motion variable can be measured, an operator error can be sensed in a structurally simple manner, precisely by combining the motion parameters of the two rolling bodies, Especially the way the rotational speeds are compared to each other. Furthermore, at least one rolling element can be controlled or decelerated or accelerated by an actuator in order to adapt two rolling elements to one another if their motion parameters differ.

The rolling bodies can be mounted separately from one another on the housing or can be connected to one another via a common shaft. Advantageous guiding properties of the appliance can be achieved if at least two rolling bodies are connected in a rotationally fixed manner to a rigid shaft.

These motion variables can be detected directly via the individual rolling bodies and/or via the axes of the rolling bodies. It can be particularly advantageous if at least one further rolling body is connected to a second shaft in a rotationally fixed manner and a first motion variable about the first axis and a second motion variable about the second shaft can be sensed by The movement variables of the two axes are compared to detect operating errors of the hand-held appliance, such as lifting at least one rolling element from the surface of the object under inspection or inadvertently driving the housing on a curved path. In addition, the guiding properties can be further improved.

If the housing can be driven in two preferred, opposite directions of movement, and if the direction of movement can be determined by the sensor unit, it is advantageously possible to avoid tilting and reorientation of the housing during a change of direction. Furthermore, it can always be ensured that the display on the housing, in particular the display of the LCD display, can be read easily.

In a further embodiment of the invention it is provided that the preferred direction of movement runs perpendicular to the longitudinal extent of the housing. The housing or the appliance can be driven with a measuring unit, in particular with a measuring unit for locating objects, as far as a corner and measure into the corner. If the tool is movable in two opposite directions during the measuring process or the positioning process, the tool can be driven particularly advantageously into two opposite corners, wherein tipping of the tool can be avoided. Advantageous corner accessibility can thus be achieved.

If at least one measuring unit is provided in the housing in the longitudinal extent of the housing in an end region, the housing can advantageously also be driven with its measuring unit around a corner.

Attached picture

Further advantages emerge from the following description of the figures. An exemplary embodiment of the invention is shown in the drawing. The drawings, description and claims contain many features in combination. The person skilled in the art can expediently consider the individual features individually or derive other meaningful combinations.

Attached are:

Figure 1: Top view of a locator,

Figure 2: A section along line II-II in Figure 1,

FIG. 3 : A detail of the underside of the locator in FIG. 1 .

Description of the embodiment

FIG. 1 shows an exemplary locator with a housing 10 and a carriage 34 . The housing 10 of the locator can be moved in two preferred opposite directions of movement 20 , 22 , which extend perpendicularly to the longitudinal extension 24 of the housing 10 . The housing 10 has on its cover 52 a handle unit 12 , which is formed by a bow-shaped handle and has a handle surface 66 . The handling unit 12 extends along the longitudinal extension 24 of the housing 10 and is formed symmetrically with respect to a plane which is developed by a longitudinal center axis 30 and a normal to the cover surface 52 ( FIG. 1 ). The handle unit 12 has a diamond-shaped cross-section that tapers toward the cover surface 52 and merges into the housing 10 with its first end 60 , which points toward the housing in the longitudinal extension 24 of the housing 10 One end region 62 of the housing 10, while the handle unit 12 leads with its second end 64 to the cover surface 52 of the housing 10 (FIGS. 1 and 2).

Along the longitudinal extent 24 , the handle unit 12 has a first operating element 68 behind the handle surface 66 at its second end 64 in the direction of an LCD image display 56 ( FIG. 1 ). Behind the handle unit 12, along the longitudinal extension 24 of the housing 10 towards the LCD image display screen 56, an operating field 54 with three operating elements 70, 72, 74 is arranged, wherein the operating elements 70, 72, 74 are arranged In a region 32 which has a radius of approximately 25 mm to the end 64 of the handle unit 12, the LCD image display 56 is formed by a monochrome image display, but can also be formed by a color image display . The operator can hold the guide with one hand via the handle unit 12 and at the same time operate the operating elements 68 , 70 , 72 and 74 , preferably with his thumb.

The handle unit 12 protrudes beyond the cover surface 52 of the orienter and forms a roll protection bow for protecting the LCD image display 56 . In the longitudinal extension 24 of the housing 10, the orientation instrument has a measuring unit 50 in an end region 48 below the LCD image screen 56, wherein the transverse extension 58 of the housing 10 corresponds substantially to the measuring unit. The width of 50 is about 100mm (Fig. 1) to be exact.

The positioning device has four rolling bodies 36, 38, 40, 42 formed as wheels, which are arranged on opposite end faces 76, 78 in the longitudinal extension 24 and in the outermost region in the transverse extension 58 ( figure 1). It is also conceivable that the positioner is equipped with only three rolling elements, wherein two rolling elements can be arranged on one end face and a single rolling element on the opposite end face. The rolling bodies 36 , 38 , 40 , 42 arranged opposite each other in the longitudinal extent 24 are connected to one another in a rotationally fixed manner via rigid shafts 44 , 46 , wherein the rigid shafts 44 , 46 pass through the measuring unit 50 .

In order to protect the rolling elements 36 , 38 , 40 , 42 , upper projections 80 , 82 are formed on the underside 84 of the housing 10 , which essentially have the shape of a disk-shaped circular segment ( FIGS. 2 and 3 ).

In order to receive movement variables, the locator has a sensor unit 16 which has two sensors 26 , 28 by means of which a first and a second movement variable can be sensed ( FIG. 3 ). The sensors 26 , 28 of the sensor unit 16 are formed by optoelectronic components, specifically fork gratings. For sensing the motion variable, each sensor 26 , 28 is coupled to one shaft 44 , 46 of the chassis 34 so that a first motion variable about the first axis 44 and a second motion variable about the second axis 46 can be measured.

Engaged on the shafts 44 , 46 are sector wheels, not shown in detail, which are moved by fork-shaped light barriers forming the sensors 26 , 28 . If the sensors 26 , 28 have two gratings suitably offset from each other for each sector wheel, the direction of movement 20 of at least one axis of the positioner can advantageously be determined by means of the sensor unit 16 via the phase of the two output signals ,twenty two.

If the operator moves housing 10 over the surface of an object under inspection, rolling bodies 36 , 38 , 40 , 42 of chassis 34 roll with their surface 14 on the surface of the object under inspection. The shafts 44 , 46 are rotated via the rolling bodies 36 , 38 , 40 , 42 and the segment wheels are rotated via the shafts 44 , 46 .

The motion variables sensed by the sensors 26 , 28 or the rotational speeds of the shafts 44 , 46 are compared in an evaluation unit (not shown in detail), so that the amount of rotation of the housing 10 around an axis 18 can be deduced from these motion variables. , the axis 18 extends in the normal direction of the surface of the object under inspection.

If a target is displayed on the LCD image display screen 56 when the locator moves on an inspected object, a notch 86 formed on an end face 78 of the housing 10 indicates that the object in the inspected object is relative to the housing. body 10 position.

Claims (12)

1. The hand-held device, especially the locator, has a housing (10), which can be moved above the surface of an inspected object by means of a holding unit (12), and the housing has a A sensor unit (16) for receiving a first motion variable, characterized in that at least one second motion variable can be sensed by means of the sensor unit (16). 2. Appliance according to claim 1, characterized in that a quantity of rotation of the housing (10) about at least one axis (18) can be ascertained from the sensed movement quantity. 3. Appliance according to claim 1 or 2, characterized in that the sensor unit (16) has at least two sensors (26, 28). 4. Appliance according to claim 3, characterized in that the sensor (26, 28) is formed at least partially by electronic components. 5. The apparatus according to claim 4, characterized in that: the sensor unit (16) has at least one photoelectric sensor (26, 28), by which the surface of the object to be inspected can be measured without contact with said two motion parameters at least one. 6. The appliance according to one of the preceding claims, characterized in that a running gear (34) with at least one first rolling body (36, 38) is arranged on the housing (10), by which at least The first motion parameter. 7. Appliance according to claim 6, characterized in that the chassis (34) has at least one second rolling body (40, 42), via which at least a second movement variable can be measured. 8. Appliance according to claim 6 or 7, characterized in that at least two rolling bodies (36, 38) are connected in a rotationally fixed manner to a first shaft (44). 9. The appliance according to claim 8, characterized in that: at least one other rolling body (40, 42) is non-rotatably connected with a second shaft (46), the first motion parameter can be passed through the first shaft (44) The sensed, second motion parameter may be sensed via a second axis (46). 10. Appliance according to one of the preceding claims, characterized in that the housing (10) can be driven in two preferred, opposite directions of movement (20, 22), which can be determined by the sensor unit (16) ( 20, 22). 11. Appliance according to claim 10, characterized in that the preferred direction of movement (20, 22) runs perpendicular to the longitudinal extension (24) of the housing (10). 12. The appliance according to claim 11, characterized in that in the housing (10), a measuring unit ( 50).

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